Kitchen Knives Verification Page

Methodology: Measuring sharpness and durability using the Cutting-Edge Retention test (ISO 8442-5) for Kitchen Knife block sets with spring-loaded integrated sharpeners. The test simulates 10 years of use, with each knife put through repeated cutting cycles.

Claim: "UK's Best Automatic Sharpening Technology Over Time" has been verified through the *Cutting Edge Retention test according to ISO 8442-5 after simulation of 10 years of use, compared to knife block sets with spring-loaded integrated sharpener

EXTERNAL LABORATORY TEST

Brand	Knife	CATRA ISO 8442-5 TCC 60
Brand	Knife	ICP Criterion ≥50	CER Criterion ≥150
TEFAL	Chef 20 cm	45.18	239.49
TEFAL	Utility 12 cm	43.49	293.38
Competitor A	Chef 20 cm	0.86	14.11
Competitor A	Slicing	9.95	122.69
Competitor B	Chef 8 in.	42.72	169.25
Competitor B	Utility 6 in.	38.62	211.72

NOTE: CER stands for Cutting Edge Retention, the higher the CER, the sharper the knife.
After simulation of 10 years of use, Tefal EverSharp Knives are sharper than Competitor A and Competitor B.